Global Patent Index - EP 4120257 A1

EP 4120257 A1 20230118 - CODING AND DECOCIDNG OF PULSE AND RESIDUAL PARTS OF AN AUDIO SIGNAL

Title (en)

CODING AND DECOCIDNG OF PULSE AND RESIDUAL PARTS OF AN AUDIO SIGNAL

Title (de)

CODIERUNG UND DECODIERUNG VON PULS- UND RESIDUALANTEILEN EINES AUDIOSIGNALS

Title (fr)

CODAGE ET DÉCODAGE DES PARTIES DE PULSE ET DES PARTIES RÉSIDUELLES D'UN SIGNAL AUDIO

Publication

EP 4120257 A1 20230118 (EN)

Application

EP 21185669 A 20210714

Priority

EP 21185669 A 20210714

Abstract (en)

The present invention relates to an audio encoder (100, 101) for encoding an audio signal (PCM<sub>i</sub>) comprising an pulse portion (P) and a stationary portion, comprising: a pulse extractor (11,110) configured for extracting the pulse portion (P) from the audio signal (PCM<sub>i</sub>), further comprising a pulse coder (132) for encoding the extracted pulse portion (P) to acquire an encoded pulse portion (CP); wherein the pulse extractor (110) is configured to determine a spectrogram of the audio signal (PCM<sub>i</sub>) to extract the pulse portion (P), wherein the spectrogram having higher time resolution than the signal encoder (152, 156'); a signal encoder (152, 156') configured for encoding a residual (R) signal derived from the audio signal (PCM<sub>i</sub>) to acquire an encoded residual (CR) signal, the residual (R) signal being derived from the audio signal (PCM<sub>i</sub>) so that the pulse portion (P) is reduced or eliminated from the audio signal (PCM<sub>i</sub>); and an output interface (170) configured for outputting the encoded pulse portion (CP) and the encoded residual (CR) signal to provide an encoded signal.

IPC 8 full level

G10L 19/20 (2013.01); G10L 19/02 (2013.01); G10L 19/025 (2013.01); G10L 19/22 (2013.01); G10L 19/26 (2013.01)

CPC (source: EP KR US)

G10L 19/02 (2013.01 - EP KR); G10L 19/025 (2013.01 - EP); G10L 19/032 (2013.01 - US); G10L 19/083 (2013.01 - US); G10L 19/20 (2013.01 - EP KR); G10L 19/22 (2013.01 - EP KR); G10L 19/26 (2013.01 - EP KR); G10L 21/10 (2013.01 - US); G10L 25/18 (2013.01 - US)

Citation (applicant)

  • EP 19166643 A 20190401
  • EP 2008004496 W 20080605
  • EP 2014053293 W 20140220
  • EP 18080837 A
  • EP 2015066998 W 20150724
  • O. NIEMEYER, B. EDLER: "Detection and Extraction of Transients for Audio Coding", AUDIO ENGINEERING SOCIETY CONVENTION, vol. 120, 2006
  • F. GHIDOS. DISCHJ. HERREF. REUTELHUBERA. ADAMI: "Coding Of Fine Granular Audio Signals Using High Resolution Envelope Processing (HREP", 2017 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), 2017, pages 701 - 705, XP033258508, DOI: 10.1109/ICASSP.2017.7952246
  • A. ADAMIA. HERZOGS. DISCHJ. HERRE: "Transient-to-noise ratio restoration of coded applause-like signals", 2017 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS (WASPAA), 2017, pages 349 - 353, XP033264960, DOI: 10.1109/WASPAA.2017.8170053
  • R. FUGA. NIEDERMEIERJ. DRIEDGERS. DISCHM. MULLER: "Harmonic-percussive-residual sound separation using the structure tensor on spectrograms", 2016 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP), 2016, pages 445 - 449, XP032900640, DOI: 10.1109/ICASSP.2016.7471714
  • 3RD GENERATION PARTNERSHIP PROJECT; TECHNICAL SPECIFICATION GROUP SERVICES AND SYSTEM ASPECTS; CODEC FOR ENHANCED VOICE SERVICES (EVS); DETAILED ALGORITHMIC DESCRIPTION, 2019

Citation (search report)

  • [XD] WO 2008151755 A1 20081218 - FRAUNHOFER GES FORSCHUNG [DE], et al
  • [X] US 5886276 A 19990323 - LEVINE SCOTT N [US], et al
  • [XDI] EDLER BERND ET AL: "Detection and Extraction of Transients for Audio Coding", AES CONVENTION 120; MAY 2006, AES, 60 EAST 42ND STREET, ROOM 2520 NEW YORK 10165-2520, USA, 1 May 2006 (2006-05-01), XP040507705
  • [X] DAUDET L ET AL: "An hybrid audio coder for very low bit rate with two-level psychoacoustic modeling", MULTIMEDIA SIGNAL PROCESSING, 1999 IEEE 3RD WORKSHOP ON COPENHAGEN, DENMARK 13-15 SEPT. 1999, PISCATAWAY, NJ, USA,IEEE, US, 13 September 1999 (1999-09-13), pages 203 - 208, XP010351724, ISBN: 978-0-7803-5610-8

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

EP 4120257 A1 20230118; CA 3224623 A1 20230119; CN 117957612 A 20240430; EP 4371110 A1 20240522; KR 20240042449 A 20240402; US 2024177724 A1 20240530; WO 2023285631 A1 20230119

DOCDB simple family (application)

EP 21185669 A 20210714; CA 3224623 A 20220714; CN 202280062481 A 20220714; EP 2022069812 W 20220714; EP 22751703 A 20220714; KR 20247004977 A 20220714; US 202418406351 A 20240108